Pump



April'28, 19 25 I J. ASTROM PUMP ' FiTed Nov. 23, 1922 I gwuanto'zPatented Apr. 28, 1925.

UNITED STATES 1,535,643 PATENT 1 OFFICE.

JOHN ASTROM, 0F FORT WAYNE, INDIANA, ASSIGIN'OR 'ro FORT WAYNE ENGINEER-ING & MANUFACTURING 00., or FORTWAYNE, INDIANA.

PUMP.

Application filed November 23, 1922. Serial No. 602,801.

To all whom it may concern. Be it known that I, JOHN AsTnoM, a citizen-of the United States, and resident of Fort Wayne, in the county'ofAllen and State'of'Indiana, have invented certain new and useiulImprovements in Pumps; and I do here y declare that the following is afull, clear, and exact description thereof.

The invention relates to new and useful improvements in pumps, moreparticularly of that type adapted for use in connection with thehandling of fuel oil and the inflammable oils, or for other uses whereit is desirous to provide acompact pump unit.

It is the general object of the invention to simplify and otherwiseimprove the structure and to increase the efficiency of pumps Iaccessible.

the number 1 designates a cran of this character and also to increasetheir durability under the average condition of use. The discharge valveis carried by a readily removable plug head and is readily The fact alsothat there is no suction valve makes for simplicity.

It is the object of my invention to provide a pump of the characterdescribed which will prevent the leakage of liquid from the pumpcylinder and the crank case, or from any ments. As t e pump is used foroils, the matter of leakage is of the greatest. importance. Thearrangement is such that liquid escaping from the discharge chamber pastthe plunger reaches only the suction chamber and remains entrapped.

The pump illustratedin the accompanying drawing possesses this feature,and it is my purpose to improve the non-leaking feature by providing astuifing box for the plunger which is entirely remote from the workingcylinder and valve and which is not subjected to the pressure of the oilin any manner within the pump.

With the above and other objects and. advantages in view, which will beapparent as the description proceeds, my invention resides in the novelfeatures of' construction,

combination and arrangement of the parts as hereinafter described anddefined by the appended claim.

In the accompanying drawings:

' The figure shows a vertical longitudinal sectional view through a pumpconstructed in accordance with my inventlon.

Referring now to the drawingI in detail, case, the

art associated with these elesame having cast integral therewith thecrosshead guideway 2 and a frame 3. The crank casing 1 is of the usualcircular shape and the crosshead guideway opens therein for thereception of the pitman 4 which connects the drive shaft 5 with thecrosshead 6.

The guideway 2 is closed at the end by a vertical wall 7 through which apiston plunger 8 is slidable for connection with the crosshead 6.

Secured to the wall 7 is a housing 9 having therein a suctioncompartment 10' and a discharge compartment 11, each having a commondivision wall 12. The compartments l0 and 11 are provided with inlet 10and outlet opening 11 respectively, f0r the fluid to be pumped, and wlthairdomes 10 14, the purpose of which. will be apparent as thedescription proceeds.

The housing 9 has'therein between the several compartments previouslyreferred to and the wall 7, a compartment 15 for the reception ofsuitable packing material 16 and a packing gland unit 16, the latterbeing ad ustable by the usual adjusting means shown in dotted lines.

The compartment 11 has arranged in its end wall, and. in axial-alignmentwith the cylinder, a removable plu 17, the central portion of which isprovide with an inward hollow projection 18, the central portion ofwhich has slidable therethru the stem of a disk valve 18, the head ofwhich closes the end of the cylinder 13. In order that the valve may atcertain times be moved away from the end of the cylinder I have providedresilient holding means in the form of a coil spring 19 encircling theprojection 18 and having its ends bearing upon the valve and plug.

Referring now to the operation of the pump: As the pistonmoves away fromthe ports 14 leading to the inlet suction compartn'ient. \Vhen thistakes place, the vacuum within the cylinder-draws the liquid from thecompartment 10 into the cylinder, filling the same. On the forwardmovement of the piston the ports 14 are closed, trapping between thevalveand the plug the liquld which on a further movementof the pistonforces the valve-open, thus permitting the liquid to enter the dischargecompartment and then pass thru the discharge opening.

From the foregoing, it is apparent that should the liquid within thecylinder, which is under pressure, leak past the pistonit will pass outthru the ports and lose its pressure in the compartment 10, beforereaching the stufling box. Thus at no time will the packing be subjectedto pressure, therefore eliminating the necessity of adjustment of thepacking.

Claim:

A pump comprising a housing having an intake chamber and a deliverychamber, said chambers being provided with outer walls, and saidchambers being separated by a partition wall, a separate and distinctsleeve carried by said partition Wall and projecting into said deliverychamber and extending completely through said intake chamber and intothe outer Wall of said intake chamber and forming a cylinder, saidsleeve havaplurality of apertures therethrough opening into said intakechamber, a resiliently urged valve positioned within said deliverychamber and contacting with the outer end of said sleeve, and a plungermounted for reciprocation within said sleeve and adapted to close saidapertures on its delivery stroke, whereby the reciprocation of saidplunger does not affect liquid in said intake chamber until theapertures in said sleeve are uncovered by said plunger. In testimonythat I claim the foregoing I have hereunto set my hand at Fort Wayne, inthe county of Allen and State of Indiana.

JOHN ASTROM,

